patternmatcher
Thisisapatternmatcherincommonlips.Weimplementthefunctionmatchwithtwoparameters:apatternandafact.Itreturnsalistofvariable-valuebindingsifthefactsmatchthepatternswhileitgivesnilifthematchfails.ThesyntaxforfactscanbeanyvalidstructureinLisp.Also,patternscaninclude,notpredicates,
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